  import { mapGetters } from 'vuex'
  export default {
    computed: {
      ...mapGetters('m_cart', ['total'])
    },
    onShow(){
      this.setBadge()
    },
    methods: {
      setBadge(){
        uni.setTabBarBadge({
          index:2,
          text: this.total + ''
        })
      }
    }
  }